Re: T-04YBSC-A, new YMF71x based sound card + SETYMF utility

Posted on 2018-07-29, 01:09

by

by 640K!enough

in Marvin \ Sound

in Marvin \ Sound

For audio jacks, the more common separation seems to be 0.5" (12.7mm) from jack to jack, and a common/safe hole size is 0.28" (7.11mm). Also, depending on where the brackets will actually be manufactured, be aware that slight rounding errors are possible. The drawings I submitted had both metric and …

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Re: Newly made Gravis Ultrasound compatible cards ... what's the degree of interest?

Posted on 2018-07-27, 20:03

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by 640K!enough

in Marvin \ Sound

in Marvin \ Sound

Unless I can find a significantly less expensive means of production, I already consider the matter closed. With the apparent lack of interest, it just isn't worth the effort. Nonetheless, taking the everyone-for-himself approach doesn't actually result in any savings, unless you already own a …

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Re: Newly made Gravis Ultrasound compatible cards ... what's the degree of interest?

Posted on 2018-07-27, 16:45

by

by 640K!enough

in Marvin \ Sound

in Marvin \ Sound

Considering ~400 (???) of these cards are going to be produced in total, and not everyone's going to want to pay someone extra for a bracket, I can't imagine it would be economical to do a production run. Your post makes a number of valid points. Personally, I would have liked to be able to opt for …

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Re: T-04YBSC-A, new YMF71x based sound card + SETYMF utility

Posted on 2018-07-26, 01:54

by

by 640K!enough

in Marvin \ Sound

in Marvin \ Sound

I never thought to ask before: is this a two- or four-layer design?

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Re: Newly made Gravis Ultrasound compatible cards ... what's the degree of interest?

Posted on 2018-07-26, 00:44

by

by 640K!enough

in Marvin \ Sound

in Marvin \ Sound

It really seems like you should be able to design the PCB to allow reuse of brackets from inexpensive Sound Blaster 16's or similar. This has been discussed before. That is quite a busy area of the card, and moving or re-ordering the jacks won't be much fun. The answer was no. Furthermore, I find …

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Re: Newly made Gravis Ultrasound compatible cards ... what's the degree of interest?

Posted on 2018-07-26, 00:25

by

by 640K!enough

in Marvin \ Sound

in Marvin \ Sound

i don't look at the back of my pcs...i can't even, i have 8 in a row and 4 in a row xD It's not just a question of appearance. As mentioned, I worry about the structural stability of such a bracket. Also, some cards have been known to depend on the bracket's conductivity for a connection to ground; …

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Re: Newly made Gravis Ultrasound compatible cards ... what's the degree of interest?

Posted on 2018-07-25, 18:15

by

by 640K!enough

in Marvin \ Sound

in Marvin \ Sound

3d printing ;) almost anywhere in the world, you can let them print in the city or order a print online for less than 5 buckazoids. At least the card is fixed more than without a bracket ;) The problem is that that doesn't actually turn out to be much less expensive than getting a batch made; I …

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Re: Newly made Gravis Ultrasound compatible cards ... what's the degree of interest?

Posted on 2018-07-25, 16:04

by

by 640K!enough

in Marvin \ Sound

in Marvin \ Sound

I just received the quote from the manufacturer, and it is about as bad as I suspected it might be. That is to say that, without question, I can't afford to even give any further consideration to a production run of brackets. I don't want to discuss the numbers publicly, but let's say that the price …

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Re: FMonster, the monster of FM synth

Posted on 2018-07-24, 16:46

by

by 640K!enough

in Marvin \ Sound

in Marvin \ Sound

The AdLib never had the IRQ line connected to the OPL2 (the interrupt flag of the OPL2 can be polled by reading 0x388, the top 3 bits indicate the timer irq status). I don't think any OPL3 card has it connected either. At least the common Sound Blasters and clones do not. My 1990 Ad Lib MSC had no …

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Re: FMonster, the monster of FM synth

Posted on 2018-07-23, 19:42

by

by 640K!enough

in Marvin \ Sound

in Marvin \ Sound

Adlib Gold theoretically supported remapping, in practice, nearly everybody still expects OPL series chips at 388h. Now that you mention it, I should try moving the Gold to another address to see if software can still find it. I suspect software that still works will be rare; likely only the few …

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Re: Newly made Gravis Ultrasound compatible cards ... what's the degree of interest?

Posted on 2018-07-23, 19:11

by

by 640K!enough

in Marvin \ Sound

in Marvin \ Sound

I'll work on a better solution when I have more time, but to allow further testing, I implemented a somewhat kludgy fix for the software, and generated a new ROM. With that particular problem fixed, playback is improved and more correct. So now, it's time for much more testing, to make sure there …

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Re: T-04YBSC-A, new YMF71x based sound card + SETYMF utility

Posted on 2018-07-23, 01:01

by

by 640K!enough

in Marvin \ Sound

in Marvin \ Sound

Will you be selling the partial boards without the YMF721? I have an OPL4 chip that I'd like to use from an Intel 440LX chipset board... To which "OPL4" are you referring? If you mean the earlier YMF278B, then it doesn't look like there is a footprint for the wavetable ROM and/or SRAM that …

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Re: T-04YBSC-A, new YMF71x based sound card + SETYMF utility

Posted on 2018-07-23, 00:37

by

by 640K!enough

in Marvin \ Sound

in Marvin \ Sound

This looks like a very interesting design. Your pictures show a YMF704, but your descriptions say YMF721. Which one will your final design use? I ask only because I've been rather curious about the 704. My limited budget means that I will have to wait, but I may be interested in picking one up when …

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Re: Newly made Gravis Ultrasound compatible cards ... what's the degree of interest?

Posted on 2018-07-22, 15:59

by

by 640K!enough

in Marvin \ Sound

in Marvin \ Sound

There may not have been much activity in this thread, but that doesn't mean that all work has stopped. Progress has been somewhat slower than it could be, but at least there is some movement. I looked into the amplifier situation, and since Phreeze reminded us that one part in the TDA1308 line was …

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Re: FMonster, the monster of FM synth

Posted on 2018-07-21, 18:04

by

by 640K!enough

in Marvin \ Sound

in Marvin \ Sound

For some additional detail in the discussion of address maps of various cards, I found this nice document with details for Creative cards. Interestingly, while it does seem to support Scali's assertion that Creative only exposes FM functionality at 388H/389H, it also states that the range at 38AH …

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Re: FMonster, the monster of FM synth

Posted on 2018-07-18, 21:28

by

by 640K!enough

in Marvin \ Sound

in Marvin \ Sound

Yes, although there is a bit of a 'gray area' there. The SB Pro 2 and later cards used the OPL3 as OPL2 as well, so the chip was available at both 0x220 and 0x388. I did some preliminary testing on my SB Pro 2, and my early conclusions were that only the first of the two ports of the OPL3 was …

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Re: Interview with AdLib employees! [done on 17/12/2016] - currenty being Edited

Posted on 2018-06-22, 18:32

by

by 640K!enough

in Milliways

in Milliways

It sounds like [someone's has a skeleton in the closet] Put 'em in the footnotes/director's commentary :-P LOL Given how insulted/snooty their rep's answer felt, it's tempting but we'll see. For now I've got bigger fish to fry. If that's their attitude, it seems more appropriate to let them rot in …

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Re: A discussion on typing with modern and retro keyboards and the absence of historical keys on laptops

Posted on 2018-06-22, 18:17

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by 640K!enough

in Milliways

in Milliways

I think the whole idea is rather ridiculous. In the case of laptops, what is the point of an expensive "thin-and-light" machine if I have to carry around an extra 1 to 3 kg worth of keyboard just to get any work done? Admittedly they didn't start the trend, but Apple has taken this to ridiculous …

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Re: In legacy GF1 mode, does the Interwave downmix 32 channels to 19293Hz

Posted on 2018-06-19, 15:52

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by 640K!enough

in Marvin \ Sound

in Marvin \ Sound

From some brief testing, it looks like iwinit does indeed set SGMI[0] high, meaning that enhanced mode is enabled. As suspected, however, the default value of this bit doesn't seem to be particularly important. Native InterWave software always seems to set this bit as required for its use. Older …

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Re: Sound Blaster 2.0 project & IRQ from OPL2

Posted on 2018-06-18, 20:11

by

by 640K!enough

in Marvin \ Sound

in Marvin \ Sound

I think it would be the other way around. DMA via the LPT will be a bit difficult, especially on older machines. Direct DMA transfers to audio hardware via the parallel port would be just about impossible; the parallel port and ISA bus are quite different. The DMA functionality would have to be …

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